/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/Lobbies.h
Promote another lobby member to leader. The local user must be the current lobby leader to promote another member.
[TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FPromoteLobbyMember](API\Plugins\OnlineServicesInterface\Online\FPromoteLobbyMember) > PromoteLobbyMember ( [FPromoteLobbyMember::Params](API\Plugins\OnlineServicesInterface\Online\FPromoteLobbyMember\Params) && Params )